How to Etch a Circuit Board(5)
Warnings
1.The etching solution is very dangerous, so always wear your gloves and goggles, and always work in an open area.
2.The Hydrochloric acid you are using is 12 molar, take care not to spill any on your skin, as it will cause SEVERE chemical burns.
3.Copper dust is toxic so please wear a dust mask.
the article source:http://www.wikihow.com/Etch-a-Circuit-Board
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